From 0b688f24b7d611db3a02f3d4ab562d049c78a17d Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 4 Dec 2021 20:21:59 -0800 Subject: [PATCH] net: add net device refcount tracker to struct netdev_queue This will help debugging pesky netdev reference leaks. Signed-off-by: Eric Dumazet Signed-off-by: Jakub Kicinski --- include/linux/netdevice.h | 2 ++ net/core/net-sysfs.c | 4 ++-- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 3d691fa..b4f7043 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -586,6 +586,8 @@ struct netdev_queue { * read-mostly part */ struct net_device *dev; + netdevice_tracker dev_tracker; + struct Qdisc __rcu *qdisc; struct Qdisc *qdisc_sleeping; #ifdef CONFIG_SYSFS diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c index 27a7ac2..3b2cdbb 100644 --- a/net/core/net-sysfs.c +++ b/net/core/net-sysfs.c @@ -1607,7 +1607,7 @@ static void netdev_queue_release(struct kobject *kobj) struct netdev_queue *queue = to_netdev_queue(kobj); memset(kobj, 0, sizeof(*kobj)); - dev_put(queue->dev); + dev_put_track(queue->dev, &queue->dev_tracker); } static const void *netdev_queue_namespace(struct kobject *kobj) @@ -1647,7 +1647,7 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index) /* Kobject_put later will trigger netdev_queue_release call * which decreases dev refcount: Take that reference here */ - dev_hold(queue->dev); + dev_hold_track(queue->dev, &queue->dev_tracker, GFP_KERNEL); kobj->kset = dev->queues_kset; error = kobject_init_and_add(kobj, &netdev_queue_ktype, NULL, -- 2.7.4